{"product_id":"horiba-conductivity-standard-solutions","title":"Horiba Conductivity Standard Solutions","description":"\u003cp\u003eGenuine HORIBA conductivity standard solutions for calibrating HORIBA conductivity, TDS and salinity meters and cells — LAQUAtwin EC pocket meters, LAQUA 200 and WQ-300 handhelds, LAQUA 1500\/2000 and F-70 benchtops, and the U-50 series field sondes.\u003c\/p\u003e\n\n\u003cp\u003eConductivity cells drift as the electrode surface fouls or platinizes, and the cell constant shifts with it. Calibrating against a certified standard restores the true cell constant. The critical point is to calibrate near the conductivity you actually measure — a cell calibrated at 84 µS\/cm will not give reliable readings in seawater, and one calibrated at 111.8 mS\/cm will be poor in drinking water.\u003c\/p\u003e\n\n\u003ch3\u003eChoosing the right standard\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e84 µS\/cm\u003c\/strong\u003e — deionized, distilled and low-conductivity water; boiler feedwater and condensate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1,413 µS\/cm (1.41 mS\/cm)\u003c\/strong\u003e — the general-purpose standard. Drinking water, groundwater, surface water and most environmental samples\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12.88 mS\/cm\u003c\/strong\u003e — brackish water, wastewater, nutrient and hydroponic solutions, higher-TDS process water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e111.8 mS\/cm\u003c\/strong\u003e — seawater, brines, salinity work and high-conductivity industrial streams\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhere a wide range is measured, calibrate at multiple points. The four-bottle 103-S set covers all four values and is the usual choice for a multi-point calibration or for equipping a new instrument.\u003c\/p\u003e\n\n\u003ch3\u003eHandling for reliable results\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePour into a clean beaker and discard after use — never return used standard to the bottle\u003c\/li\u003e\n\u003cli\u003eConductivity is strongly temperature dependent; allow the standard to reach the same temperature as your samples before calibrating\u003c\/li\u003e\n\u003cli\u003eKeep bottles tightly capped; evaporation concentrates the solution and raises its true value\u003c\/li\u003e\n\u003cli\u003eRinse the cell thoroughly with deionized water between standards, and again before measuring\u003c\/li\u003e\n\u003cli\u003eWork from low conductivity to high to minimize carry-over\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated items\u003c\/h3\u003e\n\u003cp\u003eConductivity electrodes and cells in K=0.1, K=1 and K=10 cell constants, pH buffers, ORP standards and electrode cleaning reagents are all stocked — see the \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba-parts-accessories\"\u003eHoriba Parts \u0026amp; Accessories\u003c\/a\u003e collection. The 60 mL conductivity calibration set that fits the LAQUA 200 and WQ-300 carrying cases is listed with the WQ-300 sensor accessories.\u003c\/p\u003e\n\n\u003cp\u003eBrowse all \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba\"\u003eHORIBA instruments\u003c\/a\u003e.\u003c\/p\u003e","brand":"Horiba","offers":[{"title":"103-S Set - 84 uS\/cm, 1.41, 12.88 \u0026 111.8 mS\/cm - 250 mL Each - 3200738718","offer_id":48226443100350,"sku":"3200738718","price":76.0,"currency_code":"USD","in_stock":true},{"title":"100-21 - 84 uS\/cm, 500 mL - 3200738713","offer_id":48226443133118,"sku":"3200738713","price":32.0,"currency_code":"USD","in_stock":true},{"title":"100-22 - 1.41 mS\/cm (1413 uS\/cm), 500 mL - 3200738714","offer_id":48226443165886,"sku":"3200738714","price":32.0,"currency_code":"USD","in_stock":true},{"title":"100-23 - 12.88 mS\/cm, 500 mL - 3200738715","offer_id":48226443198654,"sku":"3200738715","price":32.0,"currency_code":"USD","in_stock":true},{"title":"100-24 - 111.8 mS\/cm, 500 mL - 3200738716","offer_id":48226443231422,"sku":"3200738716","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/csm_COND_stand_560-C_Product_3be156f98f.png?v=1785337191","url":"https:\/\/envirotechonline.com\/products\/horiba-conductivity-standard-solutions","provider":"EnviroTech Services","version":"1.0","type":"link"}